Linn climate

Linn Weather in September

NOAA 1991-2020 normals for Mccook, 0.6 km from Linn

Average highs run from 95°F on September 1 to 90°F on September 30, and lows from 73°F to 68°F. Normal precipitation for the month is 3.92 in over about 8 wet days.

September day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Linn, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
92°F
Average low
70°F
Precipitation
3.92 in
Record high
106°FSep 24, 2005
Record low
53°FSep 30, 2020
Chance of a freeze
0%
Days of 90°F or more
22.9
Daylight
12 h 40 min to 11 h 55 min
Cloud cover
51%
Humidity
71%
Dew point
71°F
Wind
8.7 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Sep 195°F73°F104°F 202671°F 200823%0%
Sep 295°F73°F104°F 201870°F 202324%0%
Sep 395°F72°F105°F 201168°F 200624%0%
Sep 494°F72°F105°F 202669°F 200625%0%
Sep 594°F72°F104°F 202669°F 200625%0%
Sep 694°F72°F104°F 202660°F 201125%0%
Sep 794°F72°F104°F 202367°F 201726%0%
Sep 893°F72°F105°F 202361°F 201126%0%
Sep 993°F72°F103°F 202365°F 201126%0%
Sep 1093°F71°F105°F 202364°F 201726%0%
Sep 1193°F71°F105°F 202663°F 201726%0%
Sep 1292°F71°F104°F 202664°F 201726%0%
Sep 1392°F71°F102°F 201166°F 201726%0%
Sep 1492°F71°F105°F 202367°F 201526%0%
Sep 1592°F71°F104°F 202366°F 200826%0%
Sep 1692°F70°F102°F 202662°F 200826%0%
Sep 1791°F70°F101°F 201658°F 200826%0%
Sep 1891°F70°F101°F 201664°F 200826%0%
Sep 1991°F70°F101°F 201664°F 200826%0%
Sep 2091°F70°F101°F 201764°F 200825%0%
Sep 2191°F69°F101°F 202361°F 201225%0%
Sep 2291°F69°F103°F 202363°F 201225%0%
Sep 2390°F69°F105°F 200560°F 202124%0%
Sep 2490°F69°F106°F 200558°F 202124%0%
Sep 2590°F69°F105°F 200563°F 202123%0%
Sep 2690°F68°F102°F 200560°F 200823%0%
Sep 2790°F68°F102°F 200561°F 200822%0%
Sep 2890°F68°F105°F 200556°F 201022%0%
Sep 2990°F68°F101°F 200556°F 202021%0%
Sep 3090°F68°F99°F 202353°F 202021%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Linn, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 7:12 AM, sunset 7:52 PM
September 30
sunrise 7:25 AM, sunset 7:20 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00415721 (Mccook), public domain. Records: NOAA GHCN-Daily, station USW00012987, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.